Good news: It's slowly warming up after the arctic freeze.

An arctic blast eased its grip on much of the U.S. on Wednesday, with winds calming and the weather warming slightly a day after temperature records — some more than a century-old — shattered up and down the Eastern Seaboard.

In Atlanta, where a record low of 6 degrees hit early Tuesday, fountains froze over, a 200-foot Ferris wheel shut down and Southerners had to dig out winter coats, hats and gloves they almost never have to use. It shouldn't take too long to thaw out, though. The forecast Wednesday was sunny and 42 degrees.

In the Midwest and East, where brutal polar air has lingered over the past few days, temperatures climbed but were still expected to be below freezing.

In Indianapolis, Timolyn Johnson-Fitzgerald returned to her home after spending the night in a shelter with her three children because they lost power to their apartment. The water lines were working, but much of the food she bought in preparation for the storm was ruined from a combination of thawing and then freezing during the outage.

“All my eggs were cracked, the cheese and milk was frozen. And the ice cream had melted and then refroze. It's crazy, but we're just glad to be back home,” she said.

The cold turned deadly for some: Authorities reported at least 21 cold-related deaths across the country since Sunday, including seven in Illinois and six in Indiana. At least five people died after collapsing while shoveling snow, while several victims were identified as homeless people who either refused shelter or didn't make it to a warm haven soon enough.

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In Missouri on Monday, a 1-year-old boy was killed when the car he was riding in struck a snow plow, and a 20-year-old woman was killed in a separate crash after her car slid on ice and into the path of a tractor-trailer.

In a phenomenon that forecasters said is actually not all that unusual, all 50 states saw freezing temperatures at some point Tuesday. That included Hawaii, where it was 18 degrees atop Mauna Kea, a dormant volcano.

The big chill started in the Midwest over the weekend, caused by a kink in the “polar vortex,” the strong winds that circulate around the North Pole. The icy air covered about half the country by Tuesday, but it was moving north, returning more normal and warmer weather to most of the country. This weekend, it was expected to be in the 50s in New York and even higher in places farther south along the Eastern Seaboard.

The deep freeze dragged on in the Midwest. More than 500 Amtrak passengers were stranded overnight on three Chicago-bound trains that were stopped by blowing and drifting snow in Illinois. Food ran low, but the heat stayed on.

On Tuesday, many schools and day care centers across the eastern half of the U.S. were closed and officials opened shelters for the homeless and anyone else who needed a warm place.

With the bitter cold slowing baggage handling and aircraft refueling, airlines canceled more than 2,000 flights in the U.S., bringing the four-day total to more than 11,000.

The Lower 48 states, when averaged out, reached a low of 13.8 degrees overnight Monday, according to calculations by Ryan Maue of Weather Bell Analytics. An estimated 190 million people in the U.S. were subjected to the polar vortex's icy blast.